# Scrapy settings for books_rank_crawler project
#
# For simplicity, this file contains only settings considered important or
# commonly used. You can find more settings consulting the documentation:
#
#     https://docs.scrapy.org/en/latest/topics/settings.html
#     https://docs.scrapy.org/en/latest/topics/downloader-middleware.html
#     https://docs.scrapy.org/en/latest/topics/spider-middleware.html

BOT_NAME = "books_rank_crawler"

SPIDER_MODULES = ["books_rank_crawler.spiders"]
NEWSPIDER_MODULE = "books_rank_crawler.spiders"

# Crawl responsibly by identifying yourself (and your website) on the user-agent
USER_AGENT = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36"

# Obey robots.txt rules
ROBOTSTXT_OBEY = True

# Configure maximum concurrent requests performed by Scrapy (default: 16)
# CONCURRENT_REQUESTS = 32

# Configure a delay for requests for the same website (default: 0)
# See https://docs.scrapy.org/en/latest/topics/settings.html#download-delay
# See also autothrottle settings and docs
# DOWNLOAD_DELAY = 3
# The download delay setting will honor only one of:
# CONCURRENT_REQUESTS_PER_DOMAIN = 16
# CONCURRENT_REQUESTS_PER_IP = 16

# Disable cookies (enabled by default)
# COOKIES_ENABLED = False

# Disable Telnet Console (enabled by default)
# TELNETCONSOLE_ENABLED = False

# Override the default request headers:
# DEFAULT_REQUEST_HEADERS = {
#    "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
#    "Accept-Language": "en",
# }

# Enable or disable spider middlewares
# See https://docs.scrapy.org/en/latest/topics/spider-middleware.html
# SPIDER_MIDDLEWARES = {
#    "books_rank_crawler.middlewares.BooksChinaCrawlerSpiderMiddleware": 543,
# }

# Enable or disable downloader middlewares
# See https://docs.scrapy.org/en/latest/topics/downloader-middleware.html
# DOWNLOADER_MIDDLEWARES = {
#    "books_rank_crawler.middlewares.BooksChinaCrawlerDownloaderMiddleware": 543,
# }

# Enable or disable extensions
# See https://docs.scrapy.org/en/latest/topics/extensions.html
# EXTENSIONS = {
#    "scrapy.extensions.telnet.TelnetConsole": None,
# }

# Configure item pipelines
# See https://docs.scrapy.org/en/latest/topics/item-pipeline.html
# ITEM_PIPELINES = {
#    "books_rank_crawler.pipelines.BooksChinaCrawlerPipeline": 300,
# }

# Enable and configure the AutoThrottle extension (disabled by default)
# See https://docs.scrapy.org/en/latest/topics/autothrottle.html
# AUTOTHROTTLE_ENABLED = True
# The initial download delay
# AUTOTHROTTLE_START_DELAY = 5
# The maximum download delay to be set in case of high latencies
# AUTOTHROTTLE_MAX_DELAY = 60
# The average number of requests Scrapy should be sending in parallel to
# each remote server
# AUTOTHROTTLE_TARGET_CONCURRENCY = 1.0
# Enable showing throttling stats for every response received:
# AUTOTHROTTLE_DEBUG = False

# Enable and configure HTTP caching (disabled by default)
# See https://docs.scrapy.org/en/latest/topics/downloader-middleware.html#httpcache-middleware-settings
# HTTPCACHE_ENABLED = True
# HTTPCACHE_EXPIRATION_SECS = 0
# HTTPCACHE_DIR = "httpcache"
# HTTPCACHE_IGNORE_HTTP_CODES = []
# HTTPCACHE_STORAGE = "scrapy.extensions.httpcache.FilesystemCacheStorage"

# Set settings whose default value is deprecated to a future-proof value
TWISTED_REACTOR = "twisted.internet.asyncioreactor.AsyncioSelectorReactor"
FEED_EXPORT_ENCODING = "utf-8"

# 指定csv文件字段输出顺序
# 针对 books_china_rank 爬虫的字段顺序
FEED_EXPORT_FIELDS_BOOKS_CHINA = [
    'image',
    'name',
    'author',
    'publisher',
    'start_wrap',
    'comment',
    'sell_price',
    'discount',
    'price_tit',
    'num',
    "crawl_time",
    "crawl_url"
]

# 针对 kongfz_rank 爬虫的字段顺序
FEED_EXPORT_FIELDS_KONGFZ = [
    'rank',
    'author',
    'url',
    'book_name',
    'content_introduction',
    'img_url',
    'isbn',
    'new_min_price',
    'old_min_price',
    'press',
    'press_url',
    'price',
    'pub_date',
    "crawl_time",
    "crawl_url"
]

FEED_EXPORT_FIELDS_DEDAO = [
    'index_img',
    'name',
    'introduction',
    'lecturer_name',
    'log_id',
    'log_type',
    'price',
    'publish_time',
    'score',
    "crawl_time",
    "crawl_url"
]

DOWNLOAD_DELAY = 3  # 设置下载延迟

# 启用自动限速
AUTOTHROTTLE_ENABLED = True

RANDOMIZE_DOWNLOAD_DELAY = True  # 启用随机延迟

FEED_EXPORT_ENCODING = 'utf-8-sig'  # 修复 Windows 乱码
